Question

A pendulum clock is running slow, In order to correct it, we should

• A. reduce the amplitude of oscillation.
• B. reduce the mass of the bob.
• C. reduce the length of pendulum.
• D. increase the length of pendulum.

Hint:

A slow clock has too long a time period; T = 2 pi sqrt(L/g) so decrease the length.

Answer 1

The Correct Option is C

Step 1: Slow means long period
The clock needs a smaller $T$.

Step 2: Which quantity
$T \propto \sqrt{L}$ only (for fixed $g$), with no dependence on mass or small amplitude.

Step 3: Action
Decrease $L$. Option (C).

Final Answer:
Option (C). \[ \boxed{\text{Reduce the length}} \]